Midea Indoor Control Power Instability

Indoor unit display or LEDs flicker, dim, or go blank intermittently

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Loose neutral or ground connection, Failing indoor power supply PCB, Electrical noise or surges, Moisture on PCB

How to Fix / Troubleshooting

Safety first: Turn off power before inspecting wiring or PCB.

Steps to check:

  • 1. Inspect terminal block: Ensure all power and communication terminals in the indoor unit are tight.
  • 2. Check for moisture: Look for signs of water ingress or condensation on the PCB and around wiring. Address any water leaks first.
  • 3. Use a surge protector: For portable/window units, plug into a quality surge protector to reduce damage from spikes.

When to call a technician: If flickering persists, the indoor power supply PCB may be failing and should be replaced.

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Repair Difficulty

Medium 3/5

Required Part

Indoor Power Supply PCB
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